还要洗手 Eight of 35 studies were included in the meta-analysis, which indicated a reduction in incidence of covid-19 associated with handwashing (relative risk 0.47, 95% confidence interval 0.19 to 1.12, I2=12%), mask wearing (0.47, 0.29 to 0.75, I2=84%), and physical distancing (0.75, 0.59 to 0.95, I2=87%). https://www.bmj.com/content/375/bmj-2021-068302
还要洗手 Eight of 35 studies were included in the meta-analysis, which indicated a reduction in incidence of covid-19 associated with handwashing (relative risk 0.47, 95% confidence interval 0.19 to 1.12, I2=12%), mask wearing (0.47, 0.29 to 0.75, I2=84%), and physical distancing (0.75, 0.59 to 0.95, I2=87%). https://www.bmj.com/content/375/bmj-2021-068302 vitd120 发表于 2021-11-18 15:51
为什么不能强制一半人戴口罩一半人不戴口罩,然后让他们去坐7天cruise,然后测pcr,两组对照呢?
可能过不了IRB?
说到口罩,今天路过一家挺大的房子,门口插着“Unmask our kids”,然后一大面星条旗恨不得把front facade整个给罩住。这是多大的仇恨啊!估计他家只能homeschool了,我们州公校有mask mandate,私校力度只有更大,直接要求口罩+疫苗。
你愿意被强制不戴口罩去坐邮轮嘛?说话能不能过过脑子先
这个好 我可能愿意 但转念一想 万一死了不是很冤 为科学捐躯了 然后不戴的还是继续不戴
哪里的高中啊
口罩防感染的efficacy就有50%,如果两个人都带更不止了
今天的报道是怎么了
Eight of 35 studies were included in the meta-analysis, which indicated a reduction in incidence of covid-19 associated with handwashing (relative risk 0.47, 95% confidence interval 0.19 to 1.12, I2=12%), mask wearing (0.47, 0.29 to 0.75, I2=84%), and physical distancing (0.75, 0.59 to 0.95, I2=87%).
https://www.bmj.com/content/375/bmj-2021-068302
谢谢萨马瑞 学习了
这个传染途径就是要戴口罩,cdc那么多年的protocol在哪里摆着
可笑的是医务人员戴有效,普通人戴无效?
催打第三针
确实搞笑,在口罩问题上CDC昏庸无能到极点了